Fish Surveys
Metadata
| Number of fish surveys per location, habitat, and exposure | ||||||
|---|---|---|---|---|---|---|
| Exposure | Strata | # Sites | # Transects | # Reels | Surveyed distance (m) | |
| Fanna | ||||||
| Forereef | Leeward | 2 | 1 | 2 | 6 | 150 |
| Forereef | Windward | 2 | 5 | 10 | 30 | 750 |
| Total | — | — | 6 | 12 | 36 | 900 |
| Helen | ||||||
| Backreef | Lagoon | 1 | 1 | 2 | 6 | 150 |
| Patchreef | Lagoon | 2 | 3 | 6 | 18 | 450 |
| Forereef | Leeward | 2 | 6 | 12 | 36 | 900 |
| Forereef | Windward | 2 | 5 | 10 | 30 | 750 |
| Total | — | — | 15 | 30 | 90 | 2250 |
| Merir | ||||||
| Forereef | Leeward | 2 | 3 | 6 | 18 | 450 |
| Forereef | Windward | 2 | 4 | 8 | 24 | 600 |
| Total | — | — | 7 | 14 | 42 | 1050 |
| Pulo Anna | ||||||
| Forereef | Leeward | 2 | 2 | 4 | 12 | 300 |
| Forereef | Windward | 2 | 2 | 4 | 12 | 300 |
| Total | — | — | 4 | 8 | 24 | 600 |
| Sonsorol | ||||||
| Forereef | Leeward | 2 | 4 | 8 | 24 | 600 |
| Forereef | Windward | 2 | 3 | 6 | 18 | 450 |
| Total | — | — | 7 | 14 | 42 | 1050 |
| Tobi | ||||||
| Forereef | Leeward | 2 | 5 | 10 | 30 | 750 |
| Forereef | Windward | 2 | 1 | 2 | 6 | 150 |
| Total | — | — | 6 | 12 | 36 | 900 |
| Grand total | — | — | 45 | 90 | 270 | 6750 |
QA/QC
Taxa
Observations
Location summary
| Average species richness, abundance, and biomass by location | ||||||
|---|---|---|---|---|---|---|
| Sites | # Transects | # Reels | # Taxa | Abundance (ind/m2) | Biomass (g/m2) | |
| Fanna | ||||||
| Deep | 6 | 6 | 18 | 77.50 | 13.76 | 751.79 |
| Shallow | 6 | 6 | 18 | 60.83 | 14.36 | 328.67 |
| Overall | — | 12 | 36 | 69 | 14 | 540 |
| Helen | ||||||
| Deep | 14 | 15 | 45 | 67.53 | 6.82 | 695.71 |
| Shallow | 14 | 15 | 45 | 74.87 | 9.74 | 644.16 |
| Overall | — | 30 | 90 | 71 | 8 | 670 |
| Merir | ||||||
| Deep | 7 | 7 | 21 | 67.57 | 6.33 | 875.60 |
| Shallow | 7 | 7 | 21 | 73.29 | 5.68 | 696.25 |
| Overall | — | 14 | 42 | 70 | 6 | 786 |
| Pulo Anna | ||||||
| Deep | 4 | 4 | 12 | 61.25 | 17.72 | 1431.38 |
| Shallow | 4 | 4 | 12 | 67.50 | 10.43 | 756.39 |
| Overall | — | 8 | 24 | 64 | 14 | 1094 |
| Sonsorol | ||||||
| Deep | 7 | 7 | 21 | 72.43 | 17.38 | 552.97 |
| Shallow | 7 | 7 | 21 | 64.00 | 17.17 | 439.25 |
| Overall | — | 14 | 42 | 68 | 17 | 496 |
| Tobi | ||||||
| Deep | 6 | 6 | 18 | 69.50 | 7.87 | 875.77 |
| Shallow | 6 | 6 | 18 | 73.00 | 13.96 | 671.98 |
| Overall | — | 12 | 36 | 71 | 11 | 774 |
Analyses
Diversity
| Results of Adonis model for univariate analysis of fish species richness | |||||
|---|---|---|---|---|---|
| df | SumOfSqs | R2 | statistic | p.value | |
| depth_strata | 1 | 19.699 | 0.002 | 0.155 | 0.678 |
| location | 5 | 690.066 | 0.060 | 1.086 | 0.362 |
| exposure | 1 | 859.704 | 0.075 | 6.763 | 0.013 |
| habitat | 1 | 15.851 | 0.001 | 0.125 | 0.743 |
| diver | 1 | 16.078 | 0.001 | 0.126 | 0.722 |
| Residual | 79 | 10042.063 | 0.876 | NA | NA |
| Total | 89 | 11463.122 | 1.000 | NA | NA |
Abundance
| Results of Adonis model for univariate analysis of fish abundance | |||||
|---|---|---|---|---|---|
| df | SumOfSqs | R2 | statistic | p.value | |
| depth_strata | 1 | 29.142 | 0.006 | 0.764 | 0.388 |
| location | 5 | 1239.959 | 0.235 | 6.498 | 0.001 |
| exposure | 1 | 227.512 | 0.043 | 5.961 | 0.023 |
| habitat | 1 | 2.027 | 0.000 | 0.053 | 0.800 |
| diver | 1 | 698.274 | 0.132 | 18.296 | 0.001 |
| Residual | 79 | 3015.149 | 0.571 | NA | NA |
| Total | 89 | 5280.030 | 1.000 | NA | NA |
Biomass
| Results of Adonis model for univariate analysis of fish biomass | |||||
|---|---|---|---|---|---|
| df | SumOfSqs | R2 | statistic | p.value | |
| diver | 1 | 262789.72 | 0.014 | 1.877 | 0.178 |
| depth_strata | 1 | 949917.15 | 0.051 | 6.786 | 0.015 |
| habitat | 1 | 16167.88 | 0.001 | 0.115 | 0.709 |
| exposure | 1 | 1620763.36 | 0.086 | 11.578 | 0.003 |
| location | 5 | 3180210.90 | 0.170 | 4.544 | 0.002 |
| Residual | 79 | 11058559.51 | 0.590 | NA | NA |
| Total | 89 | 18743039.71 | 1.000 | NA | NA |
By depth
By exposure
| Average species richness, abundance, and biomass by location and exposure | ||||||
|---|---|---|---|---|---|---|
| Sites | # Transects | # Reels | # Taxa | Abundance (ind/m2) | Biomass (g/m2) | |
| Fanna | ||||||
| Leeward | 1 | 2 | 6 | 69.50 | 10.40 | 812.13 |
| Windward | 5 | 10 | 30 | 69.10 | 14.79 | 485.85 |
| Helen | ||||||
| Lagoon | 4 | 8 | 24 | 67.50 | 8.04 | 190.96 |
| Leeward | 6 | 12 | 36 | 66.42 | 6.02 | 543.22 |
| Windward | 5 | 10 | 30 | 79.90 | 11.18 | 1205.17 |
| Merir | ||||||
| Leeward | 3 | 6 | 18 | 68.17 | 5.40 | 867.76 |
| Windward | 4 | 8 | 24 | 72.12 | 6.46 | 724.54 |
| Pulo Anna | ||||||
| Leeward | 2 | 4 | 12 | 62.00 | 13.51 | 667.85 |
| Windward | 2 | 4 | 12 | 66.75 | 14.64 | 1519.92 |
| Sonsorol | ||||||
| Leeward | 4 | 8 | 24 | 65.38 | 13.97 | 399.11 |
| Windward | 3 | 6 | 18 | 72.00 | 21.68 | 625.44 |
| Tobi | ||||||
| Leeward | 5 | 10 | 30 | 70.80 | 11.36 | 744.70 |
| Windward | 1 | 2 | 6 | 73.50 | 8.67 | 919.77 |
By family
By trophic group
By species
Community assemblages
| Results of community composition Adonis model | |||||
|---|---|---|---|---|---|
| term | df | SumOfSqs | R2 | statistic | p.value |
| location | 5 | 5.168 | 0.170 | 3.820 | 0.001 |
| exposure | 1 | 0.358 | 0.012 | 1.324 | 0.120 |
| habitat | 1 | 0.404 | 0.013 | 1.493 | 0.047 |
| depth_strata | 1 | 0.810 | 0.027 | 2.993 | 0.001 |
| Residual | 80 | 21.648 | 0.713 | NA | NA |
| Total | 89 | 30.376 | 1.000 | NA | NA |
| Significance of each term in the ordination model | ||||
|---|---|---|---|---|
| term | df | SumOfSqs | statistic | p.value |
| location | 5 | 6.231 | 2.860 | 0.001 |
| exposure | 2 | 2.446 | 2.806 | 0.001 |
| depth_strata | 1 | 0.968 | 2.222 | 0.002 |
| habitat | 1 | 0.569 | 1.306 | 0.065 |
| Residual | 80 | 34.865 | NA | NA |